Buggy code:
private EucalyptusUserActivity ( final String userId ) { } @ Override public String getUserId ( ) { } @ Override public DispatchingClient < ComputeMessage , Eucalyptus > getClient ( ) { } } public void terminateSystemInstance ( final String instanceId ) { } public List < RunningInstancesItemType > describeSystemInstances ( final List < String > instances ) { } public List < RunningInstancesItemType > describeUserInstances ( final String userId , final List < String > instances ) { } public List < ServiceStatusType > describeServices ( final String componentType ) { } public List < VmTypeDetails > describeVMTypes ( ) { } public List < ClusterInfoType > describeAvailabilityZones ( boolean verbose ) { } public void createSecurityGroup ( String groupName , String groupDesc ) { } public void deleteSecurityGroup ( String groupName ) { } public List < SecurityGroupItemType > describeSecurityGroups ( List < String > groupNames ) { } public void authorizeSecurityGroup ( String groupName , String protocol , int portNum ) { } public void revokeSecurityGroup ( String groupName , String protocol , int portNum ) { } public void createLaunchConfiguration ( final String imageId , final String instanceType , final String instanceProfileName , final String launchConfigName , final String securityGroup , final String keyName , final String userData ) { } public void createAutoScalingGroup ( final String groupName , final List < String > availabilityZones , final int capacity , final String launchConfigName ) { } public LaunchConfigurationType describeLaunchConfiguration ( final String launchConfigName ) { } public void deleteLaunchConfiguration ( final String launchConfigName ) { } public void deleteAutoScalingGroup ( final String groupName , final boolean terminateInstances ) { } public DescribeAutoScalingGroupsResponseType describeAutoScalingGroups ( final List < String > groupNames ) { } public void updateAutoScalingGroup ( final String groupName , final List < String > zones , final int capacity ) { } public void updateAutoScalingGroup ( final String groupName , final List < String > zones , final int capacity , final String launchConfigName ) { } public List < RoleType > listRoles ( final String pathPrefix ) { } public RoleType createRole ( final String roleName , final String path , final String assumeRolePolicy ) { } public List < SubnetType > describeSubnetsAsUser ( final String userId , final Set < String > subnetIds ) { } public List < DescribeKeyPairsResponseItemType > describeKeyPairsAsUser ( final String userId , final List < String > keyNames ) { } public List < DescribeKeyPairsResponseItemType > describeKeyPairs ( final List < String > keyNames ) { } public ServerCertificateType getServerCertificate ( final String userId , final String certName ) { } public void deleteRole ( final String roleName ) { } public List < InstanceProfileType > listInstanceProfiles ( String pathPrefix ) { } public InstanceProfileType createInstanceProfile ( String profileName , String path ) { } public void deleteInstanceProfile ( String profileName ) { } public void addRoleToInstanceProfile ( String instanceProfileName , String roleName ) { } public void removeRoleFromInstanceProfile ( String instanceProfileName , String roleName ) { } public GetRolePolicyResult getRolePolicy ( String roleName , String policyName ) { } public void putRolePolicy ( String roleName , String policyName , String policyDocument ) { } public void deleteRolePolicy ( String roleName , String policyName ) { } public List < ImageDetails > describeImages ( final List < String > imageIds , final boolean verbose ) { List < String > requestedImageIds = Lists . newArrayList ( ) ; if ( imageIds != null ) requestedImageIds . addAll ( imageIds ) ; if ( verbose ) requestedImageIds . add ( "verbose" ) ; final EucalyptusActivityTasks . EucaDescribeImagesTask task = new EucalyptusActivityTasks . EucaDescribeImagesTask ( imageIds ) ; final CheckedListenableFuture < Boolean > result = task . dispatch ( new EucalyptusActivityTasks . EucalyptusSystemActivity ( ) ) ; try { if ( result . get ( ) ) { return task . getResult ( ) ; } else <START_BUG> throw new EucalyptusActivityException ( "failed<seq2seq4repair_space>to<seq2seq4repair_space>describe<seq2seq4repair_space>keypairs" ) ; <END_BUG> } catch ( Exception ex ) { throw Exceptions . toUndeclared ( ex ) ; } } public void createTags ( final String tagKey , final String tagValue , final List < String > resources ) { } public void deleteTags ( final String tagKey , final String tagValue , final List < String > resources ) { } public void createOrUpdateAutoscalingTags ( final String tagKey , final String tagValue , final String asgName ) { } public void deleteAutoscalingTags ( final String tagKey , final String tagValue , final String asgName ) { } public void uploadServerCertificate ( final String certName , final String certPath , final String certBodyPem , final String pkPem , final String certChainPem ) { } public ServerCertificateType getServerCertificate ( final String certName ) { } public void deleteServerCertificate ( final String certName ) { } public List < TagInfo > describeTags ( final List < String > names , final List < String > values ) { } public String createVolumeAsUser ( final String userId , final String availabilityZone , final int size ) { } public String createVolume ( final String availabilityZone , final int size ) { } public List < Volume > describeVolumesAsUser ( final String userId , final List < String > volumeIds ) { } public List < Volume > describeVolumes ( final List < String > volumeIds ) { } public List < Volume > describeVolumes ( ) { } public List < TagDescription > describeAutoScalingTags ( ) { } public void deleteVolumeAsUser ( final String userId , final String volumeId ) { } public void deleteVolume ( final String volumeId ) { } public String runInstancesAsUser ( final String userId , final String imageId , final Set < String > groupNames , final String userData , final String instanceType , final String availabilityZone , final String subnetId , final String privateIp , boolean monitoring , final String keyName ) { } public List < Snapshot > describeSnapshotsAsUser ( final String userId , final List < String > snapshotIds ) { }

Fix:
throw new EucalyptusActivityException ( "failed<seq2seq4repair_space>to<seq2seq4repair_space>describe<seq2seq4repair_space>images" ) ;